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Soy allergy

Soy allergy is an immune system response to soy protein that the body mistakenly believes is harmful. Once the immune system decides that soy protein is harmful, it creates specific antibodies to it. The next time the individual eats soy, the immune system releases massive amounts of chemicals, including histamine, in order to protect the body. These chemicals trigger a cascade of allergic symptoms that can affect the respiratory system, gastrointestinal tract, skin, or cardiovascular system. The symptoms of soy allergy will only occur upon re-exposure to soy. Not all soy products may cause soy allergy. Some fermented soy foods such as tempeh, shoyu and miso cause less allergy than whole soybeans, because the fermentation process partly breaks down the proteins. Only 0.5 of the population has soy allergy. Other foods that often cause allergy in adults are shellfish, peanuts (can cause severe anaphylaxis), nuts, fish and eggs.
In children, the pattern is somewhat different. The most common food allergens that cause problems in children are eggs, milk and peanuts.

Soybean oil allergy

The consumption of soybean oil, which only contains traces of soy proteins, does normally not produce allergic reactions. The European food legislation does not consider refined soybean oil as an allergen. The European Food Safety Authority (EFSA) evaluated 2 clinical studies and concluded that is very unlikely that the consumption of fully refined soybean oil will trigger a severe allergic reaction, even in susceptible individuals.

Symptoms of soy allergy

The reported symptoms of soy allergy include: acne, angioedema, rhinitis, anaphylaxis, asthma, atopic dermatitis, bronchospasm, colitis, conjunctivitis, diarrhea, diffuse small bowel disease, dyspnea, eczema, enterocolitis, fever, hypotension, itching, laryngeal edema, lethargy, pollinosis, urticaria, vomiting, and wheezing. If you suspect that you or your child may have soy allergy, you can conduct your own tests by completely eliminating soy for a several days. Then try just one soy product to see if it causes adverse reactions. Keep in mind that intolerance reactions can occur as long as 48 hours after ingestion of an offending substance. People with soy allergy may also cross react to certain foods, such as peanuts, green peas, chick peas, lima beans, string beans, wheat, rye and barley.

How to prevent soy allergy?

If possible, only breastfeed your child and do not give solid foods until it is 6 months or older. Avoid cow's milk, wheat, eggs, peanuts and fish during your child's first year of life.


Soy allergy

I'm very allergic to soy, the effects are horrible. You don't want this. Any kind of soy is bad for me.

mamita15 - 01 November 2013

Soy Allergy - help :(

I, UNFORTUNATELY, am allergic to some soy products. The ones I have noticed the most are things like TVP and soy crisp protein bars. Some soy CHIPS I seem to be fine with so it makes no sense.

All I know is that when I ingest some soy products, I have gastrointestinal upset for about 24 hours. If I try to eat them every day, well I'll be miserable every day.

Problem is - I love soy products - for the most part. I don't want to give them up or avoid them - and I REALLY want to use the 5 lb bag of TVP that I bought without getting sick icon_smile.gif Is there anything I can do to counter the side affects? anything I can take or do to desensitize my system to the soy reactions?

Any help is appreciated.

Thank you!


Tina - 01 November 2013

Soy allergy help

I noticed that you are trying to eat soy products that have other harmful ingredients included. I am wondering--could it possibly be not the soy, but the other ingredients? TVP, for example, has hydrogenated oils and artificial colors, flavors, etc. Those products that may be in there may contribute to your gastrointestinal upset, and it may not be the soy, since not all products give you the same results. Look at the ingredients in your food, and if there is hydrogenated oils, artificial colors, or flavors, then that may be the culprits, and not the soy.

One more suggestion: try eating tofu and see how you feel. If you do not get gastrointestinal upset from that, then it's not the soy that you are allergic to. If you do get that from the tofu, then it very well may be the soy. Before you decide that you have an allergy to it, test out my theories. Then, if you find out you do have an allergy to soy, then there are other ways to get your protein, such as nut milks, grain milks, etc.

Hope this helps.

Tammy - 01 November 2013

Soy alergy

I and my family have been eating soy from many years, but never have experienced any such allergic conditions, that other peoples have mentioned. As per my knowledge, I would like to say only one thing,"all those who are suffering from soy have weak digestive or are allergic to soy, so also there are many people in this world who are allergic to potato, apples, spinach, etc etc.. So, does that mean these foods should be banned." It all depends on your digestive system. Check and eat...

Gaurav - 02 November 2013

Soy allergy help

Some Passover chocolate is safe. I stock up on chocolate chips and store them in the freezer.

Art Bars
Michel Cluizel

In the US, Whole Foods has an imported swiss chocolate--organic and soy-free.


Grieniclick - 02 November 2013

Do Baked Beans contain Soy?


Wondering if the sauce used in baked beans (I ate Heinz brand in the UK) typically contains soy? I have been attempting a soy elimination diet (with good effect) but these seem to throw me off the rails a bit.

Many Thanks


Dave E - 23 November 2013


If soy is present in a food it should be clearly mentioned in the list of ingredients or as allergen. If you do not see soy on the label, it should be soy-free.

Rob - 23 November 2013

Thanks for that... its just that I've read on a lot of sites that tomato sauce is full of soy (and that doesn't specifically list it) and I presume beans in sauce (by the same company) would also contain it...

Is Glucose Fructose Syrup (HFCS) a form of soy?

Many Thanks

Dave E - 23 November 2013

High fructose corn syrup is made from cereal starch, mainly from corn (as the name implies). It does not contain soy at all and can be eaten when you are allergic to soy.

Rob - 23 November 2013

Hi Tina,

I have soy issues too. I can eat tofu and edemame but I cannot tolerate processed soy protein, whether it's in food or face products etc, and develop angioedema.

Allison - 23 April 2014

body heat

my question is that, is it safe to have soya in ur pregnancy?
does it generates heat in body? Which will harm my pregnancy?

tejal - 03 May 2014

Chocolate and soy allergy

We are Magic chocolates. We make chocolate without Soy Lecithine. In fact without any allergen. The taste of our chocolate is a fine handcrafted organic pure chocolate. If you are interested, look on our website and webshop on and let us know what you think...

Peter Heerwegh - 01 June 2014



LONDIWE - 07 June 2014

Be careful guys

All of you who have a slight intolerance and can continue to eat soy, learn from my mistake. I was exactly that way, and continued eating bits of soy here and there. Suddenly, I developed an even more severe allergic reaction to it, and now, if even the smallest amount is ingested, I have a severe and life threatening response in my body. Soy is in everything! Try to wane off as much as possible, so that you can continue to handle it in small amounts without fear of death.

Jay - 13 November 2014

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